As soon as I get a replacement dovetail bar for the undersized unit on the Mewlon 210 I will be running my Mewlon on a DSV-3 from Desert Sky Astro. I've had the 152mm f/5.9 Kunming achromat on it (3-feet long, 24#), and that combination is adequate. Anything lighter and/or with a smaller moment arm is a piece of cake. As an added bonus you can mount two OTA's side by side, something you can't do with mounts like the DM-6.